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TI-2024-13251 Aliases CVE-2024-20317GHSA-qcxf-jg3p-ww69

Cisco IOS XR Software Layer 2 Services Denial of Service Vulnerability

Priority LOW 32CWE-684Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

A vulnerability in the handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect classification of certain types of Ethernet frames that are received on an interface. An attacker could exploit this vulnerability by sending specific types of Ethernet frames to or through the affected device. A successful exploit could allow the attacker to cause control plane protocol relationships to fail, resulting in a DoS condition. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00238 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XR Software7.7.1; 7.8.1; 7.7.2; 7.9.1; 7.8.2; 7.8.22; 7.10.1; 7.7.21; 7.9.2; 7.9.21—No fix listedCNA
  • Cisco IOS XR Software VendorCisco Affected 7.7.1; 7.8.1; 7.7.2; 7.9.1; 7.8.2; 7.8.22; 7.10.1; 7.7.21; 7.9.2; 7.9.21 Fixed in — No fix listed CNA

CPE configurations NVD · 10

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:7.7.1:*:*:*:*:*:*:*7.7.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.7.2:*:*:*:*:*:*:*7.7.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.7.21:*:*:*:*:*:*:*7.7.21VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.8.1:*:*:*:*:*:*:*7.8.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.8.2:*:*:*:*:*:*:*7.8.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.8.22:*:*:*:*:*:*:*7.8.22VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.9.1:*:*:*:*:*:*:*7.9.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.9.2:*:*:*:*:*:*:*7.9.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.9.21:*:*:*:*:*:*:*7.9.21VulnerableCisco
cpe:2.3:o:cisco:ios_xr:7.10.1:*:*:*:*:*:*:*7.10.1VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:7.7.1:*:*:*:*:*:*:* Versions 7.7.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.7.2:*:*:*:*:*:*:* Versions 7.7.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.7.21:*:*:*:*:*:*:* Versions 7.7.21 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.8.1:*:*:*:*:*:*:* Versions 7.8.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.8.2:*:*:*:*:*:*:* Versions 7.8.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.8.22:*:*:*:*:*:*:* Versions 7.8.22 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.9.1:*:*:*:*:*:*:* Versions 7.9.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.9.2:*:*:*:*:*:*:* Versions 7.9.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.9.21:*:*:*:*:*:*:* Versions 7.9.21 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:7.10.1:*:*:*:*:*:*:* Versions 7.10.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-20317
  2. 2026-10-03 Alias added: GHSA-qcxf-jg3p-ww69

References

Advisory 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences